Vulnerability · Published Aug 18, 2026 · Assigned by Zabbix
CVE-2026-23935Use-after-free read in script item/preprocessing HttpRequest body
Medium 6.8
In plain English
A medium-severity out-of-bounds read in Zabbix from Zabbix. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)6.8Medium
Exploit odds (30 days)0.5%top 56.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A Zabbix administrator is able to read out of bounds memory by utilizing a flaw in script item/preprocessing (JavaScript) HttpRequest logic, leading to potential confidentiality loss.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | zabbix | no fix listed | DEBIAN-CVE-2026-23935 |
| Debian:13 | zabbix | no fix listed | DEBIAN-CVE-2026-23935 |
| Debian:14 | zabbix | 1:7.0.29+dfsg-1 | DEBIAN-CVE-2026-23935 |
| Ubuntu:26.04:LTS | zabbix | no fix listed | UBUNTU-CVE-2026-23935 |
| Ubuntu:26.10 | zabbix | no fix listed | UBUNTU-CVE-2026-23935 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N